Mumbai Time Zone Converter

Time Zone Converter for Mumbai

Mumbai runs on India Standard Time (IST), UTC+5:30, all year round. India has no daylight saving time, so the gap between Mumbai and any city that does change its clocks moves by an hour twice a year, even though Mumbai itself never moves.

Facts that change the answer

• Time zone: Asia/Kolkata (IST), UTC+5:30
• Daylight saving: none, and no change is planned
• Half-hour offset: most of the world is a whole number of hours from UTC; IST is not, so conversions often end in :30
• 9:00 AM Tuesday in Mumbai = 10:30 PM Monday in New York, 3:30 AM in London, 12:30 PM in Tokyo, 2:30 PM in Sydney (week of 10 Nov 2026)

Worked example for Mumbai

A Mumbai team that wants a daily call with London has a natural overlap from 2:30 PM to about 6:30 PM IST, which is 9:00 AM to 1:00 PM in London during British winter time. When the UK moves to summer time on 28 March 2027, the same London morning starts at 1:30 PM in Mumbai, so the overlap moves an hour earlier for Mumbai.

The half-hour offset is what trips most people up. A meeting set for "9 in the morning New York time" lands at 7:30 PM in Mumbai during the US winter and at 6:30 PM during US summer time, because the US clocks move while IST stays fixed. Put the New York date in the converter and check the result rather than adding a remembered number of hours.

Mumbai is also a common base for back-office and IT teams that serve the US, the UK and Australia. For Sydney the order flips: Sydney is ahead of Mumbai, by 5 hours 30 minutes in the Australian summer and 4 hours 30 minutes after Sydney leaves daylight saving on 4 April 2027. Late-evening calls with the US East Coast and early-afternoon calls with Sydney are the usual pattern.

If you are booking travel, remember that flights from Mumbai to North America often arrive on the same calendar date they left, because the clock runs backwards by 9.5 to 10.5 hours along the way.

Sources: IANA time zone database (Asia/Kolkata). Checked 5 November 2026. For how the maths works, see the Time Zone Converter guide.